15x15x 0.1 / 0.3 / 0.4 / 0.5 / 0.6 / 0.8 / 1.0 / 1.2 mm 20*20* 0.3 / 0.5 / 0.8 / 1.0 / 1.2 / 1.5MM Copper Heatsink thermal Laptop CPU VGA Chip RAM Cooler